Pronóstico: Highest temperature in Shanghai on June 29?

Platform comparison

Market context

On 29 June 2026, the Shanghai Pudong International Airport Station will record its highest temperature in degrees Celsius, a real-world metric that determines the outcome of this prediction market. Today, Polymarket prices the contract with a 0% implied probability for the "YES" outcome, suggesting the crowd believes the temperature will fall outside the specific range being traded. This stark pricing contrasts with historical patterns where June highs at Pudong routinely exceed 30°C, often reaching 35°C during sunny spells, with daily highs typically increasing from 77°F to 83°F throughout the month[1][5].

Historical data frames the current 0% probability as an outlier, given that average daily high temperatures in June rarely fall below 69°F or exceed 92°F, while summer climates regularly enjoy highs surpassing 30°C[1][5]. Comparable cases from previous years show that even with light rain and gentle breezes, temperatures can hover around 29°C to 31°C, as seen in recent forecasts for Hongqiao Airport which recorded 29°C on a similar date[2]. The rapid increase in growing degree days and consistent wind speeds around 11.3 mph further suggest that thermal accumulation is significant, making a low-temperature outcome less probable than the market implies[1].

Traders should monitor the upcoming weather schedules for thunderstorm risks, which are forecast at 25% for Monday 29th, potentially suppressing peak temperatures through cloud cover and precipitation[2][6]. The dependency on Wunderground data for the final resolution means any gaps in station reporting or delays in the 12:00 UTC settlement window could introduce volatility, while the on-chain mechanics involving USDC on the Polygon network ensure that conditional tokens settle automatically once the official temperature is confirmed[3]. Recent 14-day forecasts indicate a risk of thunderstorms and light rain on the 29th, which traders must weigh against the typical summer heat that drives temperatures above 30°C[6].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Pronóstico: Highest temperature in Shanghai on June 29? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Argentina. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Argentina trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.